Number System If A + B = 30 and AB = 94, What is the value of A² + B² ? 920 625 824 712 920 625 824 712 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94 = 900 - 188 = 712
Number System What is the sum of all the prime numbers from 20 to 40? 120 119 118 117 120 119 118 117 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 23 + 29 + 31 + 37 = 120
Number System A man engaged a servant on the condition that he would pay him Rs.710 and a uniform after a year service. He served only for 8 months and got Rs.460 and a uniform. Find the price of the uniform? Rs.30 Rs.25 Rs.20 Rs.40 Rs.30 Rs.25 Rs.20 Rs.40 ANSWER DOWNLOAD EXAMIANS APP
Number System A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number? 3.5 8 6 None of these 3.5 8 6 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,3(2x + 9) = 752x = 16 => x = 8
Number System 35%of ?=242 693 487 542 394 693 487 542 394 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 693
Number System Find the number of factors of 300 excluding 1 and itself. 15 18 14 16 15 18 14 16 ANSWER DOWNLOAD EXAMIANS APP
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